The 60% Tax Trap: What Every Six-Figure Earner Needs to Know
Crossing the £100,000 income threshold is a significant milestone in your career, but it comes with a nasty surprise that many people do not see coming. Due to the way the Personal Allowance is withdrawn, income between £100,000 and £125,140 is effectively taxed at 60% — higher than the 45% additional rate that applies to income over £125,140. When you add National Insurance on top, the real marginal rate can hit 62%. This guide explains exactly why, how it is calculated, and what strategies you can use to legally reduce the damage.
How the Personal Allowance Taper Creates the 60% Rate
Everyone in the UK normally receives a Personal Allowance of £12,570 — the amount of income you can earn tax-free. However, once your adjusted net income exceeds £100,000, HMRC claws back this allowance at a rate of £1 for every £2 earned above the threshold. By the time you reach £125,140, your Personal Allowance has been completely withdrawn.
The maths behind the 60% effective rate works as follows. Consider a £1,000 pay rise when your income is between £100,000 and £125,140:
- Step 1: You pay 40% income tax on the £1,000 = £400
- Step 2: You lose £500 of Personal Allowance (£1,000 ÷ 2 = £500)
- Step 3: That £500 of previously tax-free income is now taxed at 40% = £200
- Total tax on the £1,000 rise: £400 + £200 = £600 (60%)
Add employee National Insurance at 2% on earnings above £50,270, and the true marginal rate reaches 62%. You keep just £380 from every extra £1,000 you earn in this band.
The Irony of Marginal Rates
To put this in perspective, here are the effective marginal rates at different income levels in 2026/27:
- £30,000 salary: 28% marginal rate (20% tax + 8% NI)
- £80,000 salary: 42% marginal rate (40% tax + 2% NI)
- £110,000 salary: 62% marginal rate (60% effective tax + 2% NI)
- £150,000 salary: 47% marginal rate (45% tax + 2% NI)
Someone earning £110,000 pays a higher marginal rate than someone earning £150,000. The person in the middle is taxed the most heavily — a quirk of the tax system that the Office for Budget Responsibility has acknowledged as anomalous but which the government has shown no sign of fixing.
What Counts as Adjusted Net Income?
The Personal Allowance taper is based on your adjusted net income, which includes virtually all sources of income. This means:
- Employment salary, bonuses, and overtime
- Benefits in kind (company car, private medical insurance, etc.)
- Self-employment profits and side hustle income
- Rental income from property
- Dividend income (above the £500 dividend allowance)
- Savings interest (above the Personal Savings Allowance)
- Pension income
Your adjusted net income is reduced by certain deductions, most importantly pension contributions (paid via relief at source or net pay arrangements) and Gift Aid donations. These deductions are the basis of the most effective strategies for escaping the trap.
Strategy 1: Pension Contributions
Making additional pension contributions is the single most effective way to reduce your adjusted net income and restore your Personal Allowance. There are two main routes:
Salary Sacrifice
If your employer offers salary sacrifice for pension contributions, this is the most tax-efficient option. Your gross pay is reduced before tax and NI are calculated, meaning you save income tax at the 60% effective rate plus National Insurance at 2%. Your employer also saves on their NI contributions (15%), and many employers pass some or all of this saving back to you as an increased pension contribution.
For example, if you earn £115,000 and sacrifice £15,000 into your pension:
- Your adjusted net income drops to £100,000
- Your full £12,570 Personal Allowance is restored
- The effective cost of that £15,000 pension contribution is only around £5,700 in lost take-home pay
- Your pension pot grows by £15,000 (plus any employer NI savings passed on)
Personal Pension Contributions
If salary sacrifice is not available, you can make personal contributions to a Self-Invested Personal Pension (SIPP) or other registered pension scheme. Contributions are paid net of basic rate tax (so a £10,000 gross contribution costs you £8,000), and you claim higher rate relief through Self Assessment. The contribution is deducted from your adjusted net income, restoring your Personal Allowance.
The annual allowance for pension contributions in 2026/27 is £60,000 (or 100% of your earnings, whichever is lower). You may also be able to carry forward unused allowance from the previous three tax years, giving you scope for a larger one-off contribution. Check the GOV.UK pension annual allowance page for full details.
Strategy 2: Gift Aid Donations
Charitable donations made through Gift Aid are grossed up and deducted from your adjusted net income. If you donate £800 to charity, the charity claims 20% basic rate relief, making the gross donation £1,000. That £1,000 is subtracted from your adjusted net income, potentially restoring £500 of Personal Allowance.
This makes charitable giving particularly tax-efficient in the £100,000–£125,140 band. The effective rate of relief on Gift Aid donations for someone fully within the trap is 60%, compared with 40% for a higher rate taxpayer below £100,000.
Strategy 3: Salary Sacrifice for Other Benefits
Beyond pensions, many employers offer salary sacrifice arrangements for other benefits that reduce your gross income:
- Electric vehicle salary sacrifice: Increasingly popular, with a Benefit in Kind rate of just 2% on zero-emission cars in 2026/27. You reduce your gross pay while gaining a car with minimal BIK tax.
- Cycle to work scheme: Sacrifice salary to lease a bicycle and accessories, reducing your adjusted net income.
- Additional annual leave: Some employers allow you to buy extra holiday days via salary sacrifice.
Every pound sacrificed from your gross pay within the trap effectively costs you only 38p in take-home terms, making these benefits exceptionally good value.
Strategy 4: Timing Your Income
If you have some control over when you receive income — for example, through bonus deferrals, director dividends, or self-employment invoicing — it may be possible to shift income between tax years to avoid pushing above the £100,000 threshold in any single year. This requires careful planning and ideally professional advice, but can be particularly effective for:
- Company directors choosing when to declare dividends
- Freelancers and contractors who can time their invoicing
- Employees who can defer a bonus into the next tax year
The Interaction with Other Tax Traps
The 60% trap is not the only marginal rate issue in the UK tax system. Earners approaching or exceeding £100,000 should also be aware of:
- High Income Child Benefit Charge: If either partner earns between £60,000 and £80,000, Child Benefit is gradually clawed back. At £80,000, the full amount is recovered.
- Loss of Marriage Allowance: The Marriage Allowance (worth up to £252 in 2026/27) is not available if either partner pays higher rate tax.
- Tax-Free Childcare threshold: Eligibility for Tax-Free Childcare is lost if either parent earns over £100,000.
The cumulative effect of these thresholds means that the income range from £60,000 to £125,140 is riddled with hidden tax traps. Understanding them is the first step to navigating them effectively.
See Your Personal Tax Trap Calculation
Every earner's situation is different. The amount you can save by making pension contributions, claiming Gift Aid relief, or using salary sacrifice depends on your exact income, deductions, and circumstances. Our free tax trap calculator lets you enter your salary and see exactly how the Personal Allowance taper affects your take-home pay, your effective marginal rate, and how much you could save by contributing to your pension. Run your numbers now and take control of your tax position.